Quote Originally Posted by Yurt View Post
and satan equals sin, so there you have it
Actually, that's a little bit too simple. You see, while Satan is evil, he does not control all of our actions. We have free will, otherwise we would not be accountable for our own thoughts and actions. To make Satan be responsible for every single evil that humans do diminishes the gift of free will that god gave us.

People have more than enough capacity for both the greatest good, and the greatest evil, to do both without the intervention of god, or the devil.